CVE-2009-0800 in CUPS
Summary
by MITRE
Multiple "input validation flaws" in the JBIG2 decoder in Xpdf 3.02pl2 and earlier, CUPS 1.3.9 and earlier, Poppler before 0.10.6, and other products allow remote attackers to execute arbitrary code via a crafted PDF file.
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Analysis
by VulDB Data Team • 12/14/2024
The vulnerability identified as CVE-2009-0800 represents a critical security flaw affecting multiple PDF processing libraries and applications that implement JBIG2 image decoding functionality. This vulnerability stems from insufficient input validation within the JBIG2 decoder component, which is responsible for decompressing and rendering JBIG2 compressed images commonly found in PDF documents. The affected software ecosystem includes Xpdf version 3.02pl2 and earlier, CUPS version 1.3.9 and earlier, and Poppler versions prior to 0.10.6, creating a widespread attack surface across various document processing systems.
The technical nature of this vulnerability allows remote attackers to craft malicious PDF files that contain specially formatted JBIG2 data structures designed to trigger buffer overflows or other memory corruption conditions within the affected decoders. When these malicious PDF files are processed by vulnerable applications, the flawed input validation permits attackers to manipulate memory locations and potentially execute arbitrary code with the privileges of the affected application. This type of vulnerability falls under the CWE-121 category of "Stack-based Buffer Overflow" and aligns with ATT&CK technique T1203 for "Exploitation for Client Execution" in the context of document-based attacks. The flaw essentially creates a pathway for attackers to bypass normal security boundaries through carefully constructed input data.
The operational impact of this vulnerability extends across multiple domains including enterprise document management systems, web applications serving PDF content, and print server environments that process untrusted PDF documents. Attackers can leverage this vulnerability to gain unauthorized access to systems, escalate privileges, or establish persistent access points within networks. The remote execution capability means that a single malicious PDF file could compromise systems without requiring user interaction beyond opening the document, making it particularly dangerous in environments where PDF files are automatically processed or downloaded. This vulnerability particularly affects systems that handle document processing in automated workflows, web browsers, and print management services where PDF rendering occurs without proper sandboxing or input sanitization.
Organizations should prioritize immediate patching of all affected systems, including updating Xpdf, CUPS, and Poppler components to versions that contain proper input validation and memory safety improvements. System administrators should implement network segmentation and content filtering to prevent unauthorized PDF processing, while also considering sandboxing techniques to isolate PDF rendering operations. The mitigation strategy should include regular security assessments of document processing workflows, implementation of automated vulnerability scanning for PDF files, and establishment of incident response procedures specifically addressing PDF-based attacks. Additionally, organizations should consider deploying web application firewalls and content inspection systems that can detect and block malformed PDF content before it reaches vulnerable applications. The vulnerability demonstrates the critical importance of input validation in multimedia processing components and highlights the need for robust security practices in third-party library integration within enterprise systems.